Ano ang pinakamaliit na kontinente sa mundo?
Five DuPont employees, all from DuPont's Lycra spandex plant in Mercedes, Argentina, tried to play a fast-and-loose game.

It melts at about 250° C (480° F) and yellows upon prolonged exposure to heat or light. And unlike rubber thread, spandex does not break down with exposure to body oils, perspiration, lotions, or detergents.

During the 1970s and 1980s, spandex leggings rose in popularity amongst many rock and heavy metal bands, particularly British NWOBHM and American glam metal bands.

This unique elastic property of the spandex fibers is a direct result of the material's chemical composition. [1] The deniers of a spandex fiber range from 20 to 4300 and are determined by what the product use will be. … n next to the parentheses in the structure. Wenn Sie keine Rechnung zur Hand haben, rufen Sie uns unter 044 818 86 11 an. The name "spandex" is an anagram of the word "expands". Coarser yarns, with a d…

Use of chlorine bleach can produce yellowing. This can be magnesium stearate or another polymer.

Always blended with other natural and man-made fibers such as cotton, wool, silk, and linen, spandex is lighter in weight than rubber thread.

Once the prepolymer is formed it is reacted further in various ways and drawn out to produce a long fiber. As the strands pass through the cell, they are heated in the presence of a nitrogen and solvent gas. élasthanne (France), Elastan (Germany, Sweden), elastano (Spain), elastam (Italy) and elastaan (Netherlands), and is known in the UK, Ireland, Portugal, Spain, Latin America, Australia, New Zealand and Israel primarily as Lycra.


Step 6: When the spools are filled with fiber, they are put into final packaging and shipped to textile manufacturers. The main reasons for this massive, almost universal, embracement of spandex amongst rock/metal bands was due to the fact that spandex retained its stretchy, tight fitting quality, even after extended wear.

[1] When force is applied, the folded flexible segments straighten out and then return to their original position when the force is removed. In textiles the synthetic fibre known generically as spandex is composed of at least 85 percent polyurethane by weight. How long will the footprints on the moon last? This article was most recently revised and updated by Amy Tikkanen, Corrections Manager. Polyurethane, any of a class of synthetic resinous, fibrous, or elastomeric compounds belonging to the family of organic polymers made by the reaction of diisocyanates (organic compounds containing two functional groups of structure ―NCO) with other difunctional compounds such as glycols.

Spandex is a synthetic fabric that is prized for its elasticity. N of amides is sp2 hydbridized.). Corrections? But today, spandex, better known as elastane in Europe and other parts of the world, is on the leading edge of fashion for both women's and men's under-, inner-, outer-, and active wear. Let us know if you have suggestions to improve this article (requires login). In this cell, the polymer solution is forced through a metal plate, called a spinneret. The Chemistry of Steak.

These fibers are superior to rubber because they are stronger, lighter, and more versatile. In North America it is rare in men's cheaper clothing, but prevalent in women's. Dependence of Physical Properties on Structure: (56e)mj: 3458 if you were wondering. 1,4-Benzenedicarboxylic acid, polymer with 1,4-benzenediamine When first introduced it revolutionized many areas of the clothing industry. [1] Monofilaments are round in cross section. Spandex is the largest end use for PTMG, accounting for more than 70% of global demand annually. You should know the structure of urea. As pop singer Madonna started a trend in the '80s to wear innerwear as outerwear and sports-looks translated into new street-wear fashions, Chanel couture skirts set fashion trends with the use of spandex in leggings. The Chemistry of Sriracha. Why don't libraries smell like bookstores?

It is stronger and more durable than rubber, its major non-synthetic competitor. Step 2: The prepolymer is further reacted with an equal amount of diamine.

Ano ang mga kasabihan sa sa aking kababata? Also, the stretchiness of the material did not constrict musicians movement onstage, allowing them to perform high kicks, or to rest their feet on monitors. Multifilaments are partly fused together at intervals and are found in fibers with deniers of 40 and above. So valuable is DuPont's spandex technology that it was the subject of an extortion attempt 10 years ago. Kevlar 49, monomer-based. Cross section-Spandex filaments are extruded usually from circular orifices, but the evaporation of solvent or the effects of drying may produce non-circular cross-sectional shapes.

It's really no stretch to say that spandex fiber has had a remarkable effect on the clothing we all wear. A typical ratio of glycol to diisocyanate is 1:2.

Here ethylene (ethene) is the monomer, and the corresponding linear polymer is called high-density polyethylene (HDPE).

Spandex is classified as an elastomeric fiber. The name "spandex" is an anagram of the word "expands". This process prevents the fibers sticking together and aid in textile manufacture. density- 1.199g/cm^3. Pagkakaiba ng pagsulat ng ulat at sulating pananaliksik?

Here is a small Spandex molecule in one


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